Couples won't trigger labor by having more sex in late stages of pregnancy, a new study suggests. / Stockbyte Getty Images

by Kim Painter, Special for USA TODAY

by Kim Painter, Special for USA TODAY

Sex and childbirth: Contrary to popular belief, having sex in the late stages of pregnancy does not appear to trigger labor, a new study suggests. Researchers who urged some women in Malaysia to have plenty of sex as their due dates approached found that those women did have more sex but ended up with as many medically induced labors as women who had less intercourse. "We are a little disappointed," one researcher tells Reuters. "It would have been nice for couples to have something safe, effective and perhaps even fun" to jump start the process.

ADHD and crime: A provocative new study shows that older teens and adults with attention deficit hyperactivity disorder are much more likely to commit crimes than people without the disorder, but that the crime rate drops greatly among those taking medication for the condition. (Associated Press via USA TODAY)

Yawning in the womb: Yes, babies yawn in the womb, say researchers who watched them do it with advanced ultrasound techniques. What they still don't know is why a fetus yawns -- or, for that matter, why anyone does. (NPR)

Today's talker: Guys, are you feeling extra manly today? Maybe it's all the turkey you ate. Eating meat -- especially in public -- makes many men "feel like real men," a recent study concluded. Men are more likely than women to embrace meat-eating and reject the idea that it is unhealthy or wrong, researchers tell NBC News. In the words of (vegetarian) researcher Hank Rothgerber of Bellarmine University in Louisville, Ky. , for many men, animals "just taste too good to not eat them."